Electrical water-heater.



s LE F. VARVEL.

ELECTRlCAL WATER HEATER.

I APPUCUON FRED HOV. 18, 9I4f I 1,139,001 lzltcned Muy 11, 191:3.

2 SHEETS-SHEET l.

SA LE F. VARVEL.

ELECTRICAL WATER HEATER.

' APNIC/mon man Nov. xa, 19m.

laitvntvd Malyll, 1ST! 2 SHETS- SHEET 2 ,d N N ai s f d f a T T TT T 1 TT TTT ik D@ SllJNEY L LEVBE VARVEL, OF MELBGURNE, VC'ERI., AUSTRALIA.

ELECTRCAL WATER-HETEHr i Specification of Letters atent.

Masoni.,

To all 'whgm it may concern: Y

' Be it known that l, SIDNEY L vlfiivinc Veurne, a subject of the King of Great Britain, residing' at 380 Nilliam street, Melheat, such as copper.

this annular limb is surrounded with a mica.

bourne, in the State of Victoria, Australia, have invented certain new and useful lm provements in Electrical Water Heaters; and llA do declare 'the `following to be a full, clear,l and exact description of the invention, such as will enable others skilled in the art to lwhich it a-ppertains to make and use the same.A

This `invention relates to an improved electric Water heater, such heater being constructed to give a high eiliciency with a minimum amount of electricity. The heater is simple in construction and `can be manufactured and sold at a small cost.

ln order that my invention may be the more easily understood, reference may be made' to the accompanying drawings, in whichf Figure l is a sectional-elevation of appa` ratus` embodying my invention, While Fig. 2 illustrates a sectional elevation of a modification showing `another apparatus also ein: bodying my invention.

in the accompanying drawings e is an annul-ar .limb or cylinder, hereinafter termed the inner-,annular limb or cylinder,V of suit,- alile metal forming a goed conductor of The inner wall Z) of sheet or tube c or any such material, which may otter good electrical resistance. Around this wall l), which will now be insulated, is

Wound, in the' forni of a helix, nichronie wire, German silver, or any other WireV l that may oier a high specific resistance. Each lend of this helix resistance is prefer.- ably fastened by clamps e around the Wall Z) ofthe annular limb orcylinder a to secure the fastening or" the helix; conductors taken L from these points lead through suitable inf sulated metal tubes f and g connected to the top flangek and insulated ring 71,. and pass throughA the top A(not shown on the drawings) of the outer annularlimb or cylinder hereinafter described for connection to the terminals., The spacci between the two wallieiof the inner annular limb or cylinder 'Patented May il, i915,

rApplication flied November i8, 1911i. Sferial No. 872,686.

a is now lled with oil or other liquid that may prevent the oxidi'zation of the Wire d and at the same time act as a transferring medium for the heat generated. tively this space may be filled up with metal of low speciiic heat, or any other suitable'solid for the conduction o heat.

Vent hole j may be provided at the top of the element to allow the escape of pres-l sure in the event of the oil or the like hecolning overheated,

The annular limb or cylinder is inclosed within another annular limb or cyiinderas fm, oi' corresponding shape and of such a size 65 as will allow spacing members .7c to be placed between the tufo outer walls and between thetwo inner Walls, so that when the inner annular element e is placed Within theioifter.

shellm of the annular limb m two cylin- *J0 d'rical spacings u are created between the element and said outer shell.

' At the bottom 'of the outer shell of the annular limb ,m is fixed an inlet pipe o for the supply of the Water and at a suitable point at the top of the saine shell is ixed an outlet tap p forV drawing oli the heated water.

In the construction illustrated in Fig. 2

the liber or porcelain flanges 7i and ring 71,' 80

are divided andare of such configuration as to enable them to be easily inserted be tween the walls of the inner annular limb a containing oil or the like. The said rings 7L' are of rods 1'-, suitably attached, such rods being of either electric conduction or insulating material.

Around each rod fr is Wound the heating 'element consisting; of a number of lturns of 90 l the nichroine wire or ribbon, prefrablyas before explained, in helix form.` Shouid the rods 9' be constructed of conducting mate-- rlal, an insulating medium 'such as glass,

silica or the like s may heinterposed between the heating element and` therod f. in

such a yposition as to insure goodelectrical insulation between them.v The ends or" these -elements are suitably attachedto the fiber rings k by fasteners u to allow an eiective 100 and simple connection to be made hetweeu any' of thezelaments and et the same time lterna- 55 sega'rated from each other by means to keep the element tautand preventl the turns from touching. r

Any number of such rods r may behemployed and connected either in seriesor in parallel. The unit so constructed is, as before stated', placed between the walls of the inner annuler limb a containing the oil, lead, sand or other suitable substance in a position to prevent any of the electric conducting portion of the unit making contact with the inner surface of the annular limb, and if necessary, an insulating medium of por cslain or mica'may be interposed -or this purpose.

Suitable leads may be attached where necessary to tbe heating unit. The inner annular limb a may be held 'nl position by supports i placed within tbe outer shell m of the limb m at desired intervals apart.

The action of my apparatus is as Vfol- -lowsz-lfhe electricity is passed through the helix resistance and heat 1s instantly enerated and delivered to tbe walls of the heatment.

ing element through the medium of the oil or other suitable substance as previously mentioned. The water which has been led into the bottom of the shell risesup the two narrow cylindrical spaces, at tbe. same time absorbing the heat generated 'by thev elethe water reaches its required temperature it is drawn o' at the top by means of a tap.

The device may be suitably fitted if desired with a combination tap, so that when the water is turned on the current flows through the element and vice' Versa. The apparatus may also be fitted with terminals suitably constructed to preYent any leakage of oilfand at tbe same time to be connected up to any electrical supply,

l'claimr- An electrical duid heater comprising two cylindrical walls forming an 'annular space, a closed annular member formed by two 'furtbcr cylindrical walls, with end closing' members, located in said annular space, noli ly wound high resistance wire located 'i'.'itbin' said closed annular member, al

lient condo ing medium filling said closed annular member, means for introducing cold liquid into tile lower end of said annular space below said closed annular member, and means for drawing off hot liquidV from the top end ot said annular space above said closed annular member, saidliquid being;r

l to flow upwardly on both sides of 'the closed annular member simultaneously.

j in electrical fluid beater comprising tst-'o cylii'idrical 'walls forming an .annular space, a annular member formed by two further cylindrical Walls, with end closinggmemi'iers located in said a h clically wound liigli resistance Wire annular, space,

located within said closed annular member,

insulated tubes on tbe said closed annular- 3.v An electrical fluid heater comprisingv two cylindrical walls forming an annular space, a. closed annular member formed by two further cylindrical walls, with end closing members, located in said annular space, a helically wound high resistance Wire located within said closed annular member, a liquid heat conducting medium filling said closed annular membrana vent pipe' leading from the top of said closed annular member, means for introducing cold liquid into the lower end'of said annular'space below said closed annular member, and means for drawing olf hot liquid from the to end of said annular spaceabove said close annular member, said liquid being permitted to flow upwardly on both sides of the closed an nular member simultaneously.

4. An electrical fluid heater comprising two cylindrical walls forming an annular space, a closed annularmember formed by two further cylindrical walls, with end closing members, located in said annular space, a high resistance wire helically 'Wound around the inner wall of the closed annular member and Within said lclosed annular longitudinal spacing members located on both sides of tbe closed annular member between the cylindricalvalls of the same and the other aforesaid cylindrical walls, a helically Wound high resistance wire located within said closed annular member, Ya heat conducting medium filling said cloted annular member, means -for introducing cold liquid into the lower end of said annular space below said. closed annular member, name to this specification n the presence of and means for drawing off hot liquid from two subscribing Witnesses. the top end of said annular space abovesad SIDNEY L FVRE V ARVEL, closed annular member, said liquid being i v 5 permitted to ow upwardly on both sides of Wltnses:

the closed member simultaneously. 4 ALIG4 Hmmm, Y

Intestimony whereof I have signed ny AUGUemE T. MADDEN. 

